JPH07500432A - Resonant tag circuit and deactivation device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to resonant tag circuits for electronic article surveillance devices, and more particularly to the security of such tags. Regarding clarification.

Background of the invention Electronic article monitoring (Electronic ArtIcle 5urveilla nce: EAS) device deters unauthorized removal of items from the monitored area. It is useful for making people happy. One aspect of that reassurance is that electronic article surveillance components must be protected. that the resonant tag circuit is attached to the specific item. It is also brought about by being able to see what is being done. typical electronic objects Product monitoring equipment detects products with electronic surveillance tags attached at a predetermined frequency within a controlled area. Involves objects passing through an oscillating electromagnetic field. The tag circuit is common at the frequency of the electromagnetic field. and detects the presence of the tag within the controlled area to the receiver of the electronic monitoring device. to ensure that tagged items are not removed from the protected premises without authorization. and Lawful removal of a tagged item from the premises requires that the item be placed in an electromagnetic field. This is done by removing or deactivating the tag circuit before passing the tag.

A typical resonant tag circuit includes a central dielectric layer and conductors on either side of that dielectric layer. It has a body layer. For example, U.S. Pat. No. 4,598,276 describes a central dielectric layer and It has conductor spirals on opposite sides of its dielectric layer and has an inductive component, resulting in EAS marker where a circuit resonates when exposed to an electromagnetic field of a predetermined frequency is disclosed.

In addition to each of the basic constituent layers of the EAS tag described above, various outer or cover layers are included. A layer will be provided on the conductor layer. For example, U.S. Patent No. 4,717,438 and and No. 4,843,404 for an additional outer layer of unspecified material and adhesive. Thus discloses a tag having a release sheet attached; U.S. Pat. No. 792,790 discloses a tag having an outer layer of an optically transparent carrier material. U.S. Pat. No. 4,413,254 also teaches A tag is disclosed having a single outer cover layer.

Additionally, U.S. Patent No. 4,369,557 provides a stable dielectric Polyethylene, polypropylene, polyester ( Mylar) or an insulating base fabric such as polyisobutylene. A tag having a side layer is disclosed. The preferred textile materials disclosed are low cost and affordable. Polyethylene is used because it easily adheres to aluminum foil.

Yet another example is U.S. Patent No. 4,864.280, in which one layer is paper film and a removable cover sheet, with the opposite layer being a paper film or removable cover sheet. discloses a tag having an outer layer that is a synthetic plastic material film. Ru. The possibility of printing on the latter layer is also discussed. U.S. Patent Nos. 4 and 7 83,646 is an insulator that is cheaper than polyimide and allows radio waves to pass through it easily. Open tag with outer polyester film for use as cover material It shows.

The prior art has ranged from selecting polymeric materials as the outer layer for EAS tags. Indentation or indentation to form a deactivatable tag Recognizing a number of unanticipated benefits, such as those associated with treatments involving not present.

Deactivatable EAS tags are No. 4,498,076. This patent covers one conductor so that they are closer to each other in the recess than the rest of the conductor A deactivatable resonant tag circuit where a portion of the tag is recessed into the central substrate layer. The road is disclosed. The tag becomes inactivated when exposed to an electromagnetic field of a predetermined frequency This causes arc discharge between the conductors through the substrate in the recess. electric arc concave evaporates part of the conductor near the part, thereby destroying the conductive path and inactivating the circuit. let Alternatively, the arc can permanently short the conductors and also cause the resonant characteristics of the circuit. metal placed between the conductors to form a plasma.

Other examples of deactivation tags are disclosed in the prior art such as U.S. Pat. No. 4,021,705. It consists of a central layer of electrically insulating material on both sides of the conductor material, and a resonant circuit. fuse by applying activating groups to activate or change the properties of a deactivatable tag having at least one link capable of skipping; is disclosed.

Additionally, U.S. Patent Nos. 4,778,552; 4.802.944; , 312, 4,846,922, 4,910,499, and 4,954 , 814 is connected to the inner nonconductor layer between the two conductor layers, the outer layer, and one of the outer layers. a release sheet removably bonded with an adhesive; Discloses tags that can be used.

In some situations, prior art tag circuits have It may become detuned due to contact with other objects. For example, meat is generally Packed in a breathable polymer stretch film that allows liquids or gases such as oxygen to pass through. Ru. Oxygen passing through the film imparts freshness-related brightness to the meat packed there. Gives a deep red color. However, the tag circuit is a capacitor between the inductor and the article. Detuning may occur due to quantitative coupling. In this technical field, goods or minimizes tag circuit detuning due to moisture on the item or contact with the package surface. There is a need for a stable resonant tag circuit that can suppress

Summary of the invention According to the invention, a resonant tag circuit is designed for use as an electronic article surveillance tag. It has a flexible, substantially planar dielectric substrate. The first conductor is a dielectric base a second conductor is placed on the second side of the dielectric substrate; at least one of which includes an inductor. flexible, substantially flat; The tear-resistant polymer film is attached to the surface opposite to that to be adhered to the article to be monitored. On the surface of the substrate, it is adhered to and covers one of the conductors and the substrate. this film provides a vapor barrier for the tag and its flexibility effects of the human body that detune the circuit while maintaining y) to minimize tag integrity and improve tag integrity.

Another aspect of the invention provides a predetermined resonant frequency for use as an electronic article surveillance tag. A deactivatable resonant tag circuit with a wave number sufficient to destroy the resonant properties of the circuit. means for inactivating the resonant tag circuit in response to an electromagnetic field of high energy. It is what you have. The passivating means is indented within the substrate. This means that the conductor is more reciprocal in the recessed part than in other parts of the conductor. The conductor has a portion of at least one conductor that is more closely spaced. Soft A flexible, substantially flat, tear-resistant polymeric film is attached to the monitored article. On the side of the substrate opposite to the side to be bonded, one of the conductors and the substrate are bonded and It covers it. The film provides a vapor barrier to the tag and maintains its flexibility. while minimizing the effects of the human body detuning the circuit and ensuring the integrity of the tag. improve. Additionally, as described below, the film is inert in the tag. This brings unexpected advantages to the formation of oxidation means.

Yet another aspect of the invention includes a flexible, substantially planar dielectric substrate. , is a resonant tag circuit provided for use as an electronic article surveillance tag. . The first conductor is placed on the first side of the dielectric substrate, and the second conductor is placed on the second side of the dielectric substrate. and at least one of the conductors includes an inductor. flexibility a substantially flat, tear-resistant, substantially vapor-impermeable polymer with The film is attached to each conductor on the side of each conductor opposite to the side that is placed on the dielectric substrate. and the substrate. Film is virtually impermeable to vapor Provides a barrier to the tag and detunes the circuit while still maintaining its flexibility Minimize human and article impact and improve tag integrity.

In addition, resonant tag circuits require electromagnetic waves of sufficient energy to destroy the resonant properties of the circuit. It is equipped with a means to inactivate the circuit in response to the field. The inactivation means By recessing into the board, the conductor will be exposed to other parts of the conductor in the recessed area. having certain portions of at least one conductor closer to each other than the There is. Additionally, the polymer film is inert in the tag, as described below. Bringing unexpected benefits to the formation of sexualized means.

Brief description of the drawing The foregoing summary, as well as the following detailed description of the preferred embodiments, are set forth in conjunction with the accompanying drawings. It will be better understood if you read it. To illustrate the invention, Although preferred embodiments are shown in the drawings, the invention lies in the specific construction and configuration disclosed. It is understood that the term is not limited to means. In the drawing, FIG. 1 is an exploded perspective view of a preferred embodiment of an electronic article surveillance tag according to the present invention.

FIG. 2 is a cross-sectional view of a portion of a preferred embodiment of an electronic article surveillance tag according to the present invention. .

FIG. 3 shows a portion of a preferred embodiment of a deactivatable electronic article surveillance tag according to the present invention. FIG. And FIG. 4 shows a deactivable electronic article surveillance tag according to the present invention. FIG. 4 is a cross-sectional view of a portion of another preferred embodiment of the invention;

Detailed Description of the Preferred Embodiment With reference to the figures, like numerals indicate like elements throughout, and FIGS. Use as an electronic article surveillance tag according to the invention generally designated as 10 1 shows a preferred embodiment of a resonant tag circuit for use in a resonant tag circuit.

Now, referring to FIG. 1, the resonant tag circuit 10 has a dielectric substrate 12. As shown in FIG.

In this embodiment, dielectric substrate 12 is flexible and substantially flat. is desirable. The above-mentioned characteristics of the dielectric substrate are particularly important in the manufacture of the resonant tag circuit IO. As is well known in the art, continuous woven fabrics can be This makes it possible to manufacture the following tags 10. Flexibility allows uneven surfaces Resonant tag circuits can be attached to various objects having surfaces (not shown) or human bodies (not shown). It also becomes possible to install O.

In this embodiment, dielectric substrate 12 is made of a polymeric material, preferably polyethylene. is made from. However, the dielectric substrate 12 may be polyvinyl, polystyrene, and other engineering thermoplastics It will be appreciated by those skilled in the art that the material may be made from a variety of polymeric materials, including will be done.

As best shown in FIG. 1, dielectric substrate 12 has a first surface 16 and a second surface 16. It has a surface 18. The first conductor 20 is placed on the first surface 16 of the dielectric substrate 12. ing. Further, the resonant tag circuit 10 includes a second resonant tag circuit 10 placed on the second surface of the dielectric substrate 12. It has a conductor 22. At least one of the conductors 20°22 further includes an insulator. It includes a duct 24. Both the first and second conductors 20 and 22 are inductors. form a dynamic capacitance circuit.

In this embodiment, each of the conductors 20, 22 is substantially flat and flexible. preferable. The conductors 2o, 22 are preferably made of aluminum, especially aluminum foil. Created from However, those skilled in the art will appreciate that other conductive materials such as copper or nickel can be used. It will be appreciated that a magnetic material may be used as the conductor 20.22. Also , one skilled in the art will appreciate that the conductors 20.22 may be made of different electrically conductive materials. you will understand. The desired thickness of conductors 20, 22 is approximately 3 mils; 20.22 may be of any thickness while maintaining the spirit and scope of the invention. Also good.

Inductor 24 is generally connected to conductor 22, as best shown in FIG. Formed in a spiral path surrounding the conductive part (Forved In a 5 spiral path) is preferred, but may be made in other shapes.

The conductor 20.22 has been subjected to an extrusion coating process. cess) (not shown) on the first and second surfaces 16. of the dielectric substrate 12. Preferably, it is formed over 18. Those skilled in the art will appreciate that the conductor 2o is placed on the dielectric substrate 12. , 22 and an inductor 24 according to the present invention. Understand that it is not particularly relevant to the understanding and is well known in the prior art. will.

Further explanation of this part of the manufacturing process is not deemed necessary or limiting. .

As best shown in FIG. 1, the inventive resonant tag circuit IO includes a conductor 20. It has a polymer film 27, 26 adhered to and covering 22. 1st Polymer film 27 is adhered to conductor 2o and surface 16 of dielectric substrate 12, and It covers one. The second polymer film 26 covers the conductor 22 of the dielectric substrate 12 and the conductor 22 of the dielectric substrate 12. It is adhered to and covers the duct 24 and surface 18.

In a further preferred embodiment shown in FIG. conductor 24 and surface 18 of dielectric substrate 12, i.e. the article to be monitored of the substrate (Fig. (not shown) and covers the conductor 22. It includes a rimmer film 26.

The resonant tag circuit IO of this further preferred embodiment includes conductor 2° and the other previously described A polymer film adhered to and coated on surface 16 of dielectric substrate 12 in the preferred embodiment. lum 27 (shown in Figures 1--3).

Polymer films 27, 26 facilitate the manufacture of this resonant tag circuit 10 and electronic articles. Unevenness of various articles and bodies (not shown) to be protected by the monitoring device A flexible and substantially planar surface is used for adhering the tag 10 to a surface. desirable. This polymeric film 27.26 also desirably has tear resistance. , thereby maintaining its flexibility and ensuring the integrity of the tag lo. improves.

This polymer film 27, 26 is connected to the adjacent conductor 20 or 22 and the dielectric substrate 12. It is desirable to provide a vapor barrier to the Eliminate. This polymer film 27.26 is based on ASTM D570-63. It is desirable to have a hygroscopicity of less than 0.8%. This low moisture absorption A particularly smooth wrinkle-free printing surface and virtually reliable heat transfer properties are maintained. The resonant tag circuit 28 is superior in that it facilitates manufacturing of the resonant tag circuit 28.

Another advantage of this stabilized tag circuit is that the inductor is capacitively connected to the object or object. To withstand the resulting circuit detuning. For example, as I mentioned earlier Meat is typically packaged with water-permeable polymeric films. in it Packaging films with absorbed water have lower intensities than the same films without water. It has pedance. When a typical prior art tag is attached to a meat package , this tag circuit may become detuned by the meat (i.e., article detuning).

In addition, this tag must be removed by the person installing it or inspecting the item. may occur as a result of circuit handling (human contact) (i.e. physical separation). tone). In the present invention, this polymer film 27 detunes the tag circuit. Articles that provide a substantially water-impermeable barrier that inhibits both detuning and body detuning. It is.

Another example of a situation where it would be advantageous to use this tag is to identify a patient in a hospital. An arm or ankle band commonly used for For example, in a nursery room, this Tags are used as identification bands to prevent infants from being removed from protected areas can be done. General prior art tags are used in such applications. This results in detuning of the circuit because there is no barrier between the circuit and the patient's skin. Polymer of the invention - Film 27 has a barrier layer that minimizes circuit detuning to improve circuit operation. This is what we provide.

Conopolymer film 27.26 was measured based on ASTM D882-80. has a tensile strength greater than 26°000 psi in the machine direction I hope so. This high tensile strength is due to the tear strength of the polymer film 27.26 It shows the inherent properties of the polymer material that contributes to it and maintains its original flexibility. while promoting reliable integrity of the resonant tag circuit B10. High tensile strength Also, polymer films with a thickness less than about 2 mils 27.26, i.e., in the prior art. The thickness of the paper used for the outer layer of the tag disclosed in make it possible.

A person skilled in the art will be able to install a resonant tag circuit i to cover the conductor 20.22 and stabilize the laminate. The prior art example of pasting paper on both sides of an o is recognized. In general, that The thickness of eel paper is on the order of 3.5-4 mils. In contrast, the policy of the present invention The mer films 27, 26 each have a thickness of about 2 mils or less, preferably less than 2 mils. I have it. Outside the polymer film 27.26 on both sides of the tag 10 instead of the paper layer By using layers, the total thickness of the tag can be reduced to less than about 12 mils. Poly In other preferred embodiments that omit the marker film 27, the tag layer is replaced with a layer of paper. By using an outer layer of polymeric film 26 on one side of the The total thickness of such tags is reduced from about 9 mils to less than about 7 mils relative to prior art tags. reduced.

Those skilled in the art can use polyethylene, polyvinyl chloride +7) and other plastics. Although it may be understood that other polymeric materials such as Preferably, the film 27.26 is made of polyester. This polymer film 27.26 can be made of the same or different polymeric materials as required. Wear. For example, if the polymer film 27 is made of polyvinyl chloride and The remer film 26 can also be made of polyethylene. Preferably this poly Marfilm 27.26 is made of the same material.

Suitable polyester films 27.26 can include, for example, Mylar. , it's Praware Wilmington's Yi, I, DuPont Dou Nemu. It is available commercially from Le Co., Ltd. Mylar is available in a variety of colors. . Fabricating the resonant tag circuit 10 using Mylar of various colors allows Mylar can show visual differences between tags resonating at different frequencies Excellent in that respect. This tag can be printed with a thermal printer An outer layer of thermal printing paper (not shown) may be added to the Mylar layer.

The preferred polyester film 27 or 26 is Melinex, which is a plastic Wear available commercially from Ulmington's ICI Americas Inc. It is. Melinex has sufficient flexibility and a gauge thickness of less than about 1 mil. It is preferred because it has strength and appropriate gas/liquid impermeability.

The use of polymer film 27.26 in tag 10 ．． 26 resists warping or shrinkage, thereby being substantially smooth and wrinkle-free; It is superior in that it provides a printing surface facing the conductor 22. . Smooth, wrinkle-free resulting from the use of polymeric films 27.26 Printing surface makes it easy to print prices and other information on the tag 10 are doing. The use of polymeric film 27.26 replaces previous paper-covered tags. Thermal type and leather with extremely small printing clearance that could not be printed. The tag 10 can be printed by a set of other printers. Also, thinner The more flexible tag 1° reduces the pressure on the printer head.

If a non-thermal printer is used, the polymer film is coated with one layer to receive ink or toner for formula printing You can stay there. Such printable films are available in Newtown, Pennsylvania Dunmore Cope, (Dunm.

reCorp,) 200 Dukote C ITC) (DK-393), which is specially coated It is a Melinex film.

The resonant tag circuit IO connects each polymer film 27.26 to each conductor 20.22 and base. further comprising adhesive layer(s) 30 adhering to each of the surfaces 16, 18 of the plate 12. I'm here. Adhesive layer(s) 30 are each less than about 1.5 mils thick, and are preferably preferably in the range of about 0.5 to 1.5 mils.

Preferably, the resonant tag circuit 10 includes a release liner 32, such as paper or plastic. further comprising a backing film, which is opposite from the conductor 20 and the substrate 12. It is removably glued on the surface. In yet another embodiment shown in FIG. Release liner 32 connects conductor 20 on opposite side 16 from polymer film 26. Desirably, it is removably bonded to the dielectric substrate 12.

The release liner 32 is attached to the tag 10 before attaching the tag 10 to the article to be protected. be stripped from. The present invention provides a release liner having a thickness greater than 3.5 mils. It may be possible to use it in combination with the tag, but the release liner 32 is about 3 ．． Desirably, it has a thickness of 5 mils or less.

Another aspect of the invention is that the outer layers for the resonant tag circuit 28 can be deactivated. 27.26 and is best shown in Figure 3. has been done. Deactivatable resonant tag circuit 28 is substantially similar to resonant tag circuit 10. A similar, but deactivable, tag 28 is designed to reduce the resonant characteristics of the tag circuit 28. tag 28 in response to an electromagnetic field (not shown) of sufficient energy to destroy the It further includes means for activating.

The means for passivating includes recessing one of the conductors 22 recessed into the substrate 12. 36 (sometimes referred to as dimples). conductor 20.22, thereby causing the conductor 20.22 to recess in the recessed portion 36. The two parts are closer to each other than the other parts. Those skilled in the art will understand the details of the invention. Either or both of the conductors 20 and 22 are recessed into the substrate 12 while maintaining the distance between the conductors 20 and 22. They will understand that it is okay to be forced to do something.

In another preferred embodiment, best shown in FIG. a plurality of recessed portions 36 facing away from the polymer film 26; is preferably provided on the surface of the substrate 12 of the conductor 20 ( one or more portions) are recessed into the substrate 12.

A deactivatable resonant tag circuit 28 is located between the conductors 20.22 and recessed. It is destroyed at portion 36 by an arc discharge (not shown) through the substrate 12. Ah vaporize a portion of the conductor 20.22 (not shown) very close to the recessed portion. , thereby destroying the conductive path and inactivating the circuit. Or arc forms a plasma of metal deposited between the conductors, causing a short circuit. , and destroys the resonant ability of the tag lO.

The process by which tag 28 may be deactivated is well described in U.S. Pat. No. 4,498,076. is explained in.

A preferred process for making deactivatable tags 28 is described by G. In large part, U.S. Pat. No. 3,913,219 to Llcchtblau (G.) and are incorporated by reference into this disclosure.

Those skilled in the art will appreciate that other similar processes are within the spirit of the invention. It will be understood that it can be used while maintaining the range.

generally a dielectric covered on either side by a layer of conductor(s) One roll of printing circuit R (Fjl number) with a matrix substrate is one or more ports carried on carriers (?I number) Can be attached to rimmer film. Polymer film and printed circuit are attached The adhesive is attached to the polymer filament to be attached to the printed circuit(s) before applied to the surface of the lum. The printed circuit (?jI number) and the film (plurality) are one It is held together by the pressure applied by two pressure rolls. stuck together The printed circuits and films are stabilized and deactivated together. To form the tag, adhesive 30 and polymer film 26, the steps shown in FIG. A printed circuit (complex) is used to form the recessed portion 36 best shown. number) and passed through a dimpled (indented) roll. preferred In one embodiment, the tag web is then coated with a pressure sensitive adhesive 30 and and attached to the polymer film 27. As a result, the person who is away from the item Only the face of the tag with the polymer film in place is recessed.

In another preferred embodiment, the polymer film 27 and adjacent The adhesive 30 is removed and the recessed portions 36 are replaced by a polymer film. Formed in the conductor 20 and the substrate 12 on the surface of the substrate 12 opposite to the surface facing 26# has been done.

The web and release liner 32 are connected to a matrix carrier (Kasumi atrix car). one anvil roll and one The matrix carrier is passed between two Guikapto cylinders, and the matrix carrier is Collected on rolls. If desired, release liner 32 and optional The web is sensitive so that thermal printing paper sticks to the web. It is substantially coated with pressure adhesive 34 . Although this adhesive 34 is a pressure sensitive quantity, , those skilled in the art will appreciate that non-pressure sensitive adhesives may also be used. Probably. The final web of resonant tag circuit(s) is stored on one roll. Will.

Polymer films 27.26 during any part of the tag manufacturing process that involves heating. of the polymer film 27.26, since it allows a substantially constant heat transfer. Its use is particularly advantageous in the process of the present invention. Reliable heat conduction properties in one This is due to the uniform thickness obtained by extrusion of the polymer material. Polymer fi Another advantage of using Lum 27°26 is that it provides even more reliable heat transfer. Low hygroscopicity and polymer film thickness of approximately 1 mil each It has a high tensile strength which makes it possible to use film 27.26.

From the above, the present invention provides a stabilized tag for use as an electronic article surveillance tag. It can be seen that it is equipped with a resonant tag circuit. Engineers in this technical field Modifications may be made to the embodiment(s) described above without departing from the broader spirit of the invention. It is understandable that this could be done. Therefore, this invention It is not limited to the particular embodiments shown, but is defined by the claims. It is understood that modifications within the spirit and scope of the invention as described herein are intended to be covered. Should be.

Figure 4 Continuation of front page (81) Designated countries EP (AT, BE, CH, DE.

DK, ES, FR, GB, GR, IT, LU, MC, NL, SE), AU, CA , FI, J.P., K.R., N.

(72) Inventor: Ortiz, Luis, Huelipe, Puerto Rico, USA Ponce 00731 Urbanización, Santa Teresita Carre 13-A5-16 (72) Inventor: Mazotzky, Garry, Tee, United States of America, Newshire sea state 08080 Sewell, Pulte Drive

Claims (19)

[Claims] 1. A resonant tag circuit for use as an electronic article surveillance tag, comprising: a flexible, substantially planar dielectric substrate having a first side and a second side; a first conductor placed on a first surface of the dielectric substrate; a second surface of the dielectric substrate; a second conductor placed above, an inductor possessed by any of the conductors, and a second conductor placed above; is bonded to the opposite surface of the electric body to the surface to be bonded to the monitoring article, and one of the conductors and the dielectric A flexible, substantially flat, tear-resistant, evaporative material that covers an electrical object. an airtight polymer film, the film comprising the conductor and the dielectric; providing a vapor impermeable barrier against Equipped with This minimizes the impact on the product and the detuning of the circuit, preserving its flexibility. While the integrity of the tag has been improved, the resonant tag circuit. 2. The polymer film resists warping or shrinkage and is thereby substantially smooth. providing a printed surface that is wrinkle-free and oriented to the conductor; The resonant tag circuit of claim 1. 3. The resonant tag circuit of claim 1, wherein the tag has a thickness of about 7 mils or less. 4. The resonant tag circuit of claim 1, wherein the dielectric substrate comprises a polymeric material. 5. 5. The resonant tag circuit of claim 4, wherein said dielectric substrate comprises polyethylene. 6. The resonant tag circuit of claim 1, wherein at least one of said conductors comprises aluminum. 7. The resonant tag circuit of claim 1, wherein the polymer film is polyester. 8. the polymer film has a thickness of about 2 mils or less; The resonant tag circuit of claim 1. 9. the polymer film has a temperature absorption of less than about 0.8 percent; The resonant tag circuit of claim 1. 10. the polymer film has a tensile strength of about 26,000 psi; The resonant tag circuit of claim 1. 11. Adhesive means adheres the polymer film to the conductor and substrate; the means of attachment has a thickness of approximately 1.5 mils or less; The resonant tag circuit of claim 1. 12. The tag further includes the conductor and substrate on the opposite side from the polymer film. comprising a release liner removably adhered to the plate; The resonant tag circuit of claim 1. 13. The resonant tag circuit of claim 1 for use as an electronic article monitoring device tag. has a predetermined resonant frequency, and further, In response to an electromagnetic field of sufficient energy to destroy the resonant properties of the circuit, means for deactivating the wave tag circuit, the deactivating means Both parts are partially recessed into the dielectric substrate, and the recessed portion is thereby recessed. , the conductors become closer to each other than the rest of the conductor. It is equipped with the following parts. A resonant tag comprising: means for inactivating the resonant tag circuit. 14. The resonant tag circuit of claim 1 further comprising a flexible, substantially flat and tear resistant tag circuit. a second polymeric film that is resistant and vapor impervious to the other conductor and substrate; a plate that is adhered to a surface opposite to the surface placed on the dielectric substrate and covers it; and the film is vapor impermeable to the conductor and the dielectric. provided with a barrier; This minimizes the impact on the product and the detuning of the circuit, preserving its flexibility. While the integrity of the tag has been improved, the resonant tag circuit. 15. The second polymeric film resists warping or shrinkage, thereby substantially providing a printing surface that is oriented to the conductor and is smooth and wrinkle-free. , the printing surface of which is placed on the conductor and dielectric substrate of the polymer film. 15. The resonant tag circuit of claim 14, wherein the resonant tag circuit is placed on a surface opposite to the surface of the resonant tag circuit. 16. 15. The resonant tag circuit of claim 14, wherein the tag has a thickness of about 12 mils or less. 17. Adhesive means connects the polymer film to each of the conductors and the substrate, respectively. and the adhesive means has a thickness of about 1.5 mils or less; 15. The resonant tag circuit of claim 14. 18. the tag further being removably adhered to the second polymer film; 15. The resonant tag circuit of claim 14, comprising a release liner. 19. 15. The resonant tag circuit of claim 14 for use as an electronic article surveillance device tag. has a predetermined resonant frequency, and In response to an electromagnetic field of sufficient energy to destroy the resonant properties of the circuit, means for deactivating the wave tag circuit, the deactivating means being at least a portion thereof is recessed into the dielectric substrate, thereby recessing the portion; the conductors are closer to each other than the rest of the conductor. It is equipped with the following parts. 15. The resonant tag circuit of claim 14, further comprising means for inactivating said resonant tag circuit.